PHP/Osclass Developer to Modernize Marketplace

I am looking for an experienced PHP/Osclass developer to modernize an existing marketplace website built with Osclass 8.3.1 using the Epsilon theme. This is NOT a rebuild project. The goal is to improve... (Budget: $250 - $750 USD, Jobs: Database Management, Graphic Design, HTML, JavaScript, PHP, Web Development, Website Design, Website Optimization)